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WQP Home >  Providers >  NWIS >  USGS-TX >  USGS-08181400

Helotes Ck at Helotes, TX (USGS-08181400) site data in the Water Quality Portal

Data Provider: NWIS (Learn more about Water Quality Portal Data Providers)

This stream site, maintained by the USGS Texas Water Science Center (identifier USGS-TX), has the name "Helotes Ck at Helotes, TX" and has the identifier USGS-08181400. This site is in the watershed defined by the 8 digit Hydrologic Unit Code (HUC)12100302. See more details of this site the the USGS NWIS Web page for this site. This site has a drainage area of 15.0 sq mi and the contributing drainage area is 15.0 sq mi.

This site is located in Bexar County County, Texas at 29.57856108000000 degrees latitude and -98.6916896000000 degrees longitude using the datum NAD83. The horizontal location collection method was "Interpolated from MAP." and the accuracy is 5 seconds. The source map scale is 1:24000. This site is at an elevation of 1014.82 feet and the accuracy of the elevation measurement, collected using the method "Level or other surveyed method." is .1 feet. The vertical coordinate reference system is NGVD29.

To download the metadata about this site along with water quality data, go to the Portal Page and enter "USGS-08181400" into the "Site ID" box under Site Parameters

What other monitoring locations are upstream or downstream from this one?

Upstream and downstream locations

This map shows all Water Quality Portal stations that are 10 miles upstream (dashed dark blue) and 10 miles downstream (solid light blue) of this monitoring location (indicated by the large blue circle). The upstream and downstream functionality is provided by the Network Linked Data Index.

When were data collected at this location?

Periods of record for data characteristic groups

For a more detailed breakdown of data, go to the Monitoring Report at the EPA How's My Waterway Application
Characteristic Group Date Range*
Biological, Algae, Phytoplankton 2018 - 2018
Biological, Fish 2018 - 2018
Information 1969 - 2021
Inorganics, Major, Metals 1969 - 2021
Inorganics, Major, Non-metals 1969 - 2021
Inorganics, Minor, Metals 1973 - 2021
Inorganics, Minor, Non-metals 1969 - 2021
Microbiological 1976 - 2009
Nutrient 1969 - 2021
Organics, Other 1969 - 2021
Organics, PCBs 1973 - 2000
Organics, Pesticide 1969 - 2021
Physical 1969 - 2021
Radiochemical 1981 - 2012
Sediment 1972 - 2007
Stable Isotopes 2011 - 2021
*Date ranges may contain gap years

What other information is available for this location?

Detailed Metadata

For the definitions of the metadata elements, please go to the Water Quality Portal user guide

Location Metadata Value
OrganizationIdentifier USGS-TX
OrganizationFormalName USGS Texas Water Science Center
MonitoringLocationIdentifier USGS-08181400
MonitoringLocationName Helotes Ck at Helotes, TX
MonitoringLocationTypeName Stream
HUCEightDigitCode 12100302
DrainageAreaMeasure/MeasureValue 15.0
DrainageAreaMeasure/MeasureUnitCode sq mi
ContributingDrainageAreaMeasure/MeasureValue 15.0
ContributingDrainageAreaMeasure/MeasureUnitCode sq mi
LatitudeMeasure 29.57856108000000
LongitudeMeasure -98.6916896000000
SourceMapScaleNumeric 24000
HorizontalAccuracyMeasure/MeasureValue 5
HorizontalAccuracyMeasure/MeasureUnitCode seconds
HorizontalCollectionMethodName Interpolated from MAP.
HorizontalCoordinateReferenceSystemDatumName NAD83
VerticalMeasure/MeasureValue 1014.82
VerticalMeasure/MeasureUnitCode feet
VerticalAccuracyMeasure/MeasureValue .1
VerticalAccuracyMeasure/MeasureUnitCode feet
VerticalCollectionMethodName Level or other surveyed method.
VerticalCoordinateReferenceSystemDatumName NGVD29
CountryCode US
StateCode 48
CountyCode 029
ProviderName NWIS